Which canvas tent attached to a 14' cargo?

[rebar]

Hello people..

I have a 14x7 Kiefer narrow track cargo trailer I would like to attach a big/huge tent to for sleeping and relaxing in. The trailer will have a bathroom and kitchen maybe.

The tent needs to be tall enough to walk in comfortably and be connected to either the rear of, or curb side of the trailer so that you can walk freely through the door from one to the other..

I think no one makes something specifically like this? But there must be a suitable tent I can hire someone to modify to do so..

Any suggestions as to which canvas tent I should consider modifying? Or a company who might modify their tent to fit onto my cargo trailer?

Or maybe some search word suggestions like SUV tent? Looks like a Napier Backroadz SUV tent might work. Its not canvas but no modifications would be needed maybe..

Thanks!